<div dir="ltr"><div><div>This is discussed in the grads scripting language page as follows: <br><br>"The expression is evaluated, and the resulting string is then
submitted to GrADS as a command for execution. The script variable
<code>rc</code> will contain the return code from the GrADS command
(this will always be an integer value). In addition, any text output
from GrADS in response to the command is put in the variable
<code>result</code> for examination by the script. A GrADS error
resulting from an invalid command WILL NOT terminate execution of the
script."<br><br></div>This means that when you run a command in the equivalent command line prompt mode (i.e., surrounded with quotes) the output, which would normally be printed to the screen if you were running the command at the grads prompt would instead be stored in a variable called "result". You can then use some commands to capture parts of that variable to use in your script. The best way to see what it contains is to include the line<br>
<br>say result<br><br></div>immediately after any command in your script that may produce graphics or a computation. rc on the other hand returns an integer value detailing the success or failure of a certain command to properly run. I think usually rc = 0 means the command ran properly with no errors, whereas a nonzero code will give you an indication of what type of error occurred. You can thus use rc for error handling in your script.<br>
<br>Hope this helps.<br><br>Jeff Duda<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, May 13, 2013 at 2:44 PM, leonardo <span dir="ltr"><<a href="mailto:leoclarke@yahoo.com" target="_blank">leoclarke@yahoo.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-size:10pt;font-family:arial,helvetica,sans-serif"><div>Dear GrADS Users</div><div><br></div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial,helvetica,sans-serif">
Can anyone give me some details on the <span style="font-weight:bold">"rc"</span> and <span style="font-weight:bold">"result" </span>variables in GRADS?</div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial,helvetica,sans-serif">
<br></div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial,helvetica,sans-serif">What are their purpose?</div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial,helvetica,sans-serif">
How they
are used in scripting?</div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial,helvetica,sans-serif"><br></div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial,helvetica,sans-serif">
Regards</div><div style="font-style:normal;font-size:13.3333px;background-color:transparent;font-family:arial,helvetica,sans-serif">LC<br></div></div></div><br>_______________________________________________<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Jeff Duda<br>Graduate research assistant<br>University of Oklahoma School of Meteorology<br>Center for Analysis and Prediction of Storms<br>
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